Compounds and Chemical Formulas

Ionic compounds are compounds that_________.

• consist only of metallic elements

• have atoms that transfer electons

• exist as individual ions

• all of the above

Compounds consist of atoms of nonmetals that are held together by covalent bonds

• Ionic

• Covalent

All compounds consist of a fixed ratio of elements.

• True

• False

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NGSS.MS-PS1-1

In the molecular formula CO₂, the number 2 is called a _________.

• superscript

• subscript

• coefficient

• postscript

Two or more atoms that have been chemically combined are called a ____________.

• formula

• molecule

• mixture

• polyatom

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When there is just one atom of an element in a molecule, this atom is represented by the

• subscript 1

• subscript 0

• absence of a subscript

• none of the above

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When a molecule is made up of more than two different elements ( Example CO₂)  we call this .......................

• a mixture 

• atom

• a compound 

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Are these molecules also compounds?

• YES

• NO

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NGSS.MS-PS1-1

What is a compound?

• Two different elements bonded together.

• Two of the same elements bonded together.

• A mixture of different substances.

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NGSS.MS-PS1-1

Which of the following is a chemical formula?

• H₂SO₄

• Si

• Hg

• C

Tags

NGSS.MS-PS1-1